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The world’s top 40 mining firms cut costs by a combined 5 percent and capital spending by 20 percent last year as they grappled with a plunge in prices that drove their market value to a 10-year low, auditing firm PricewaterhouseCoopers’ annual survey showed.

Striking union workers at a joint BP Plc and Husky Energy refinery in Toledo, Ohio ratified a new contract on Wednesday and are due to return to work on Monday, four months after walking off their jobs, a refinery official said.

Engineering and construction company SNC-Lavalin Group Inc said on Wednesday it is not for sale after a newspaper report citing unnamed sources said it had been “informally” approached by two possible buyers.